The HD74HC138P is a commonly used part manufactured by Hitachi, Ltd. The supply and demand status is balanced. This part is used in various applications such as multiplexers and demultiplexers, address decoders, and memory address decoding. The HD74HC138P is a 3-to-8-line decoder/demultiplexer that has three binary select inputs (A, B, and C) and an enable input (E). The device is designed to be used with 74HC series devices and is capable of operating at high speeds with low power consumption.